Sash-cord guide



(No Model.)

r. SJ LARKSON... SASH CORD GUIDE.

Patented Mar. 31, 1896.

UNITED STATES PATENT ()FFICE.

FRANK S. CLARKSON, OF BALTIMORE, MARYLAND.

SASH-CORD GUIDE SPECIFICATION forming part of Letters Patent N 0.557,489, dated March 31, 1896.

Application filed May 14, 1895. Serial No. 549,290. (No model.)

To all whom it may concern:

Be it known that I, FRANK S. CLARKSON, of Baltimore, in the State ofMaryland, have invented certain new and useful Improvements in Sash-CordGuides; andI do hereby declare the following to be full, clear, andexact description of the invention, such as will enable others skilledin the art to which it ap-' pertains to make and use the same.

My invention relates to an improvement in sash-cord guides; and itconsists in certain novel features of construction and combinations ofparts, which will be hereinafter described, and pointed out in theclaims.

In the accompanying drawings, Figure 1 is a sectional view through aportion of a window-frame and through my improved cordguide. Fig. 2 is adetached view, and Fig. 3 is a View showing the form of the socket inwhich the guide is placed.

A A represent the sides of the shell, and B and O the upper and lowerends respectively, which constitute a projection or projections at theouter edge of the sash-cord guide to limit its insertion into themortise.

D is the usual sheave or roller over which the weight-cord passes.

The ends, especially the lower end, are preferably narrower than thesides, and inwardly and downwardly inclining shoulders a a are formed atthe lower edge of the sides A A. These shoulders preferably extend fromthe outer edge of the cord-guide for some distance back and reachbeneath the axis 2 of the sheave. It may bestated that it is notabsolutelynecessary that these shoulders should extend the entiredistance beneath the axis of the sheave, or the entire depth of thestrip E, as shown, although it is desirable, as it gives an extendedbearing and at the point where it is most needed-namely, in a directline of the applied weight and strain.

The socket F in the window-frame conforms in shape of course to thiscord-guide,the two inclining offsets f f being provided as seats for theshoulders at a to rest upon, and the upper and lower ends f f being cutjust deep enough to receive the ends 13 and O of the cord-guide.

In applying the device it simply has to be raised high enough so theshoulders a aclear the offsets f f. Then the guide is pushed inward anddownwardly, the lower end a little in advance of the upper end, theextreme upper end B entering the upper end f of the socket F last, itsupper edge f being slightly beveled for this reason. When in place, nofastening whatever is required, and it can only be removed by lifting itand forcing it outward at the same time, the upper end slightly inadvance, or, in short, in the reverse order of its insertion into thesocket; but the construction is such that in removing the device it isdone against the natural tendency, which provision furnishes aneffectual safeguard against accidental displacement.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts described without departing from thespirit and scope of my invention, and henceI do not wish to limit myselfto the exact construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A sash-cord guide, consisting of a casing having adownwardly-inclined bearing forming its lower edge which extends fromfront to rear of the guide, said bearing having a smooth, straight andunobstructed surface which gives direction to the guide from the time itfirst enters the mortise to the time it becomes seated and whichconstitutes a support or bearing upon which the guide rests or isseated, a sheave in the casing, and a projection located at the outeredge of the casing to limit the inward movement of the casing in themortise, substantially as set forth.

2. A sash-cord guide consisting of a casing provided with projecting endplates which are of less width than the thickness of the casing, saidcasing being constructed with downwardly-inclined bearings at its upperand lower ends which form laterally-projecting inclined bearings onopposite sides of said projecting ends.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

FRANK s. CLARKSON.

Witnesses:

MURRAY HANSON, IVILLIAM H. BERRY.

